Buildings with inclusive hydro have one meter for the entire building. No meters for every apt, or individual floors. So they shouldn't notice a thing as far as power is concerned.

But I'd be more worried about the leaky pipe, toilet scenario.

If you do grow put them in a room that building staff wouldn't need access to. There doesn't need to be a leak in your apt, could be on some floor above you and they would have to systematically work their way up/down to find the location of the problem.